Do you change to a lower viscosity motor oil for the winter or run a block heater? Heated parking?
No. I run Rotella 5w40 all year round. I have used that oil down to -25°c (Picking up my 2015 DL1000 from the dealership in Late Feb or early January and it sat overnight outside. (It was a cold ride but only about 20km to home.) I also had Rotella 5w40 on my 2006 DL650 running in Death Valley in temperatures up to 52°c / 126°f with no issues. That bike also had about 185,000 km on it a the time. Never had any issues starting in the cold. On liquid cooled bikes the viscosity isn't as big a deal as long as it's thin enough to start.